Institute of Catalysis
Bulgarian Academy of Sciences

Institute of Catalysis
Bulgarian Academy of Sciences

Acad. G. Bonchev St., Bldg. 11,
Sofia 1113, Bulgaria

Tel: +359 2 9793563;
fax: +359 2 9712967;
e-mail: icatalys@ic.bas.bg

www.ic.bas.bg » Departments > Laboratories Български

Laboratories  
Advanced Oxidation Processes
Plasma methods for synthesis of nano-sized materials and for clean environment

The Institute of Catalysis at BAS has designed and built two installations for plasma-chemical preparation of nano-disperse powder materials using plasma state. The installations apply electric arc discharge and high-frequency induction discharge, generated by high¬frequency plasmatron. These two installations appear to be the very first equipment of this kind in our country and they were designed in collaboration with the Institute of Inorganic Chemistry at the Riga Technical University in Latvia and with the Institute of Chemistry, Technology and Metallurgy at the Belgrade University in Serbia.
The plasma methods are applicable to various fields of the industry. One of the directions for practical application of plasma is its use for fast and ecologically clean synthesis of finely dispersed nano-sized particles. In view of the applied high temperatures it is an especially valuable method for synthesizing and for processing (spheroidization, surface modification) of high temperature melting refractory materials. In the field of catalysis the plasma-chemical technologies are applied for the synthesis and activation of catalysts; deposition of catalytically active compounds and composites on different supports; modification of catalysts; regeneration of spent catalysts. The plasma methods find also application for promoting the effectiveness of the catalytic processes, whereupon the reacting gases are being activated in plasma state prior to entering the catalyst bed.

The high-frequency induction plasma finds a wide scope of applications, owing to the fact that:

  • It is a clean method and it does not contaminate the environment, as it does not apply any electrodes;
  • The plasma is stable and it can be utilized within a wide range of operating conditions;
  • It has relatively large volume and low plasma velocity, as a result of which one can achieve complete melting and evaporation of solid-state materials during their processing due to the longer residence time interval;
  • The high precision is important for determining the effect of pollution, as well as for forecasting the plasma properties of the so treated materials;
  • The high-frequency field can induce all kinds of gases or gaseous mixtures, which enables unlimited flexibility upon choosing the plasma-forming gases depending on the type of the application, whereupon one can obtain nitrides in nitrogen atmosphere, carbides in СО2 or oxides in air or oxygen atmosphere.


Head

Vladimir Georgiev
Assistant Professor, PhD

(+359 2) 9792594

email: vlado@ic.bas.bg

Staff:

Slavcho Rakovsky, Professor, PhD, DSc
Diana Filkova, Associate Professor, PhD
Katya Milenova, Assistant Professor, PhD



Announcements

10 December 2018
Конкурс zа назначаване на длъжност „изследовател“ по проект BG05M2OP001-1.001-0008-С02


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